We can know scientists try different ways to make observations in paragraph 2.

在第二段中，我们可以知道科学家尝试不同的方法进行观察。

youdao

Besides, it's very interesting because I can not only play with my family and friends in water but also learn from my friends and try different ways of swimming.

此外，游泳也很有趣，因为我不但可以与家人、朋友在水里玩，而且还可以向朋友学习，学习不同的游泳方式。

youdao

Besides, it's very interesting because I can not only play with my family and friends in water but also learn from my friends and try different ways of swimming.

此外，游泳也很有趣，因为我不但可以与家人、朋友在水里玩，而且还可以向朋友学习，学习不同的游泳方式。

youdao